<template>
<div id="home">
  <nav-bar class="home-nav"><div slot="center">购物街</div></nav-bar>
  <tab-control :titles="['流行','新款','精选']"
               @tabClick="tabClick" ref="tabControl1"
               class="tab-control" v-show="isTabFixed"></tab-control>
  <scroll class="content" ref="scroll" :probe-type="3" @scroll="contentScroll" :pull-upload="true"
          @pullingUp="loadMore">
    <home-swiper :banners="banners" @swiperImageLoad="swiperImageLoad"/>
    <recommend-view :recommends="recommends"/>
    <FeatureView/>
    <tab-control :titles="['流行','新款','精选']"
                 @tabClick="tabClick" ref="tabControl2"
                  :class="{fixed: isTabFixed}"></tab-control>
    <goods-list :goods="showGoods"/>
  </scroll>
  <back-top @click.native="backClick" v-show="isShowBackTop"/>

</div>
</template>

<script>

import HomeSwiper from "./childrenComps/HomeSwiper";
import RecommendView from "./childrenComps/RecommendView";
import FeatureView from "./childrenComps/FeatureView";

import NavBar from "components/common/navbar/NavBar";
import TabControl from "components/content/tabControl/TabControl";
import GoodsList from "components/content/goods/GoodsList";
import Scroll from "components/common/scroll/Scroll";
import BackTop from "components/content/backTop/BackTop";

import { getHomeMultidata,getHomeGoods } from "network/home";
import {debounce} from "@/common/utils";
import {itemListenerMixin} from "common/mixin";

// import Swiper from "components/common/swiper/Swiper";
// import SwiperItem from "components/common/swiper/SwiperItem";
// import { Swiper,SwiperItem } from "components/common/swiper"
export default {
  name: "Home",
  components: {
    HomeSwiper,
    RecommendView,
    FeatureView,
    NavBar,
    TabControl,
    GoodsList,
    Scroll,
    BackTop
  },
  mixins: [itemListenerMixin],
  data() {
    return {
      banners: [],
      recommends: [],
      goods: {
        'pop': {page: 0,list: []},
        'new': {page: 0,list: []},
        'sell': {page: 0,list: []},
      },
      contentType: 'pop',
      isShowBackTop: false,
      tabOffsetTop: 0,
      isTabFixed: false,
      saveY: 0
    }
  },
  computed: {
    showGoods() {
      return this.goods[this.contentType].list
    }
  },
  activated() {
    this.$refs.scroll.scrollTo(0,this.saveY,0)
    this.$refs.scroll.refresh()
  },
  deactivated() {
    this.saveY = this.$refs.scroll.getScrollY()
    //取消全局事件的监听
    this.$bus.$off('itemImageLoad',this.itemImgListener)
  },
  created() {
    this.getHomeMultidata()
    this.getHomeGoods('pop')
    this.getHomeGoods('new')
    this.getHomeGoods('sell')
  },
  mounted() {
    // //监听item中图片加载完成
    // let newRefresh = debounce(this.$refs.scroll.refresh,100)
    //
    // //对监听的事件进行保存
    // this.itemImgListener = () => {
    //   newRefresh()
    // }
    // this.$bus.$on('itemImageLoad',this.itemImgListener)
  },
  methods: {
    /*
     *事件监听相关方法
    */
    tabClick(index) {
      switch (index) {
        case 0:
          this.contentType = 'pop'
          break
        case 1:
          this.contentType = 'new'
          break
        case 2:
          this.contentType = 'sell'
          break
      }
      this.$refs.tabControl1.currentIndex = index;
      this.$refs.tabControl2.currentIndex = index;
    },
    backClick(){
      this.$refs.scroll.scrollTo(0,0,300)
    },
    contentScroll(position) {
      this.isShowBackTop = -position.y > 1000

      //tabControl是否吸顶
      this.isTabFixed = (-position.y) > this.tabOffsetTop
    },
    loadMore(){
      this.getHomeGoods(this.contentType)

      //this.debounce(this.$refs.scroll.scroll.refresh)
      this.$refs.scroll.scroll.refresh()
    },
    swiperImageLoad() {
      this.tabOffsetTop = this.$refs.tabControl2.$el.offsetTop;
    }
    /*
     *网络请求相关方法
     */,
    getHomeMultidata() {
      getHomeMultidata().then(res => {
        console.log(res)
        this.banners = res.data.data.banner.list;
        this.recommends = res.data.data.recommend.list;
      })
    },
    getHomeGoods(type) {
      const page = this.goods[type].page + 1
      getHomeGoods(type,page).then(res => {
        this.goods[type].list.push(...res.data.data.list)
        this.goods[type].page += 1

        this.$refs.scroll.finishPullUp();
      })
    }
  }
}
</script>

<style scoped>
#home {
  /*padding-top: 44px;*/
  height: 100vh;
  position: relative;
}
.home-nav {
  background-color: var(--color-tint);
  color: #fff;
  /*position: fixed;*/
  /*left: 0;*/
  /*right: 0;*/
  /*top: 0;*/
  /*z-index: 9;*/
}

.tab-control {
  position: relative;
  z-index: 9;
}
.content {
  overflow: hidden;
  position: absolute;
  top: 44px;
  bottom: 49px;
}
</style>
